diff options
| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-11-28 12:44:05 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 10:18:04 +0900 |
| commit | f9a4e6df52edf8ce1040d1b8d340d31234a1bce3 (patch) | |
| tree | 582de93c164bba60633884bc3834d546da5cb529 /fs/f2fs | |
| parent | 36795567942a033ef9e22d8eba86396ffb9aa80c (diff) | |
| download | linux-f9a4e6df52edf8ce1040d1b8d340d31234a1bce3.tar.gz | |
f2fs: bug fix on bit overflow from 32bits to 64bits
This patch fixes some bit overflows by the shift operations. Dan Carpenter reported potential bugs on bit overflows as follows. fs/f2fs/segment.c:910 submit_write_page() warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type? fs/f2fs/checkpoint.c:429 get_valid_checkpoint() warn: should '1 << ()' be a 64 bit type? fs/f2fs/data.c:408 f2fs_readpage() warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type? fs/f2fs/data.c:457 submit_read_page() warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type? fs/f2fs/data.c:525 get_data_block_ro() warn: should 'i << blkbits' be a 64 bit type? Bug-Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 3 | ||||
| -rw-r--r-- | fs/f2fs/data.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 4 | ||||
| -rw-r--r-- | fs/f2fs/segment.h | 4 |
4 files changed, 7 insertions, 6 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 3e62987e333a..21e721534965 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -426,7 +426,8 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi) cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version); /* The second checkpoint pack should start at the next segment */ - cp_start_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg); + cp_start_blk_no += ((unsigned long long)1) << + le32_to_cpu(fsb->log_blocks_per_seg); cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version); if (cp1 && cp2) { diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 2d02cf36d806..24f752de6a90 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -525,7 +525,7 @@ static int get_data_block_ro(struct inode *inode, sector_t iblock, != (dn.data_blkaddr + i)) || maxblocks == i) break; map_bh(bh_result, inode->i_sb, dn.data_blkaddr); - bh_result->b_size = (i << blkbits); + bh_result->b_size = (((size_t)i) << blkbits); } f2fs_put_dnode(&dn); trace_f2fs_get_data_block(inode, iblock, bh_result, 0); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 1e8371392dcd..03878634a0fe 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -270,8 +270,8 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) static void f2fs_issue_discard(struct f2fs_sb_info *sbi, block_t blkstart, block_t blklen) { - sector_t start = ((sector_t)blkstart) << sbi->log_sectors_per_block; - sector_t len = ((sector_t)blklen) << sbi->log_sectors_per_block; + sector_t start = SECTOR_FROM_BLOCK(sbi, blkstart); + sector_t len = SECTOR_FROM_BLOCK(sbi, blklen); blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0); trace_f2fs_issue_discard(sbi->sb, blkstart, blklen); } diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index b84dd2396665..07887e1cc704 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -86,9 +86,9 @@ #define TOTAL_SECS(sbi) (sbi->total_sections) #define SECTOR_FROM_BLOCK(sbi, blk_addr) \ - (blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) + (((sector_t)blk_addr) << (sbi)->log_sectors_per_block) #define SECTOR_TO_BLOCK(sbi, sectors) \ - (sectors >> ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) + (sectors >> (sbi)->log_sectors_per_block) #define MAX_BIO_BLOCKS(max_hw_blocks) \ (min((int)max_hw_blocks, BIO_MAX_PAGES)) |